JP3471999B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
Related to disposable diapers. [0002] 2. Description of the Related Art
Liquid permeable top sheet, liquid impermeable back sheet and
These have an absorber interposed between both sheets, and are worn when used
The abdominal part located on the abdomen and the dorsal part located on the dorsal
The so-called unfolded disposable diapers that are formed are
Widely used. However, conventional disposable disposable diapers
Are tape fasteners provided on the left and right side edges of the back side
To the front side of the back sheet on the ventral side.
And stood up because it was used to secure diapers
Poor operability when mounting as it is, and during mounting
Poor fit, poor fit, diapers
There was a problem that a gap was formed and leakage occurred. Accordingly, an object of the present invention is to provide an operability at the time of mounting.
And disposable with excellent fit during mounting
To provide diapers. [0005] [0006] [Means for Solving the Problems]BookThe invention provides a liquid permeability table
Face sheet, liquid-impermeable back sheet and both sheets
With an absorber interposed between them, it is placed on the abdomen of the wearer when used.
And the dorsal part located on the dorsal side
To the left of the back side
Flaps are connected to each side of the right side.
Tip at least one of the right flaps
Is provided with a flap fastening portion.
By the wearing part, the left and right flaps are placed on the ventral side of the wearer.
It is made so that it can be fixed, on the above-mentioned ventral part
Are provided with diaper fastening parts on both the left and right sides.
The diaper fastening part is brought into contact with the above flap to secure the diaper
So that the flap is at its proximal end
The telescopic part has a telescopic part.
Stretch in the longitudinal direction
Disposable diapers characterized by being made
I will provide aAchieved the above objectivesThings. [0007] DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a disposable diaper according to the present invention will be described.
This will be described in more detail with reference to the accompanying drawings. Fig. 1
It is a front view which shows one form of the disposable diaper of Ming, FIG.
Fig. 2 is a development view of the disposable diaper shown in Fig. 1. Also,
FIG. 3 shows a usage form of the disposable diaper shown in FIG.
FIG. 3A is a view showing a state in which a flap fastening part is fastened.
FIG. 3 (b) is a front view showing the state when
It is a front view which shows the state at the time of fastening a fastening part. The disposable diaper 1 of the present embodiment is shown in FIGS.
2, liquid-permeable topsheet 2, liquid-impermeable
Back sheet 3 and absorber interposed between these sheets
4 and abdominal part A and
And a dorsal part B located on the dorsal side.
It is a disposable diaper. More specifically, the disposable of this embodiment
As shown in FIG. 1 and FIG.
The lower region is curved in an hourglass shape with a narrowed top surface sheet.
And the back sheet 3 also has a crotch region according to the shape of the absorber 4
As described above, the absorber 4 is curved.
Sheet 2 and back sheet 3.
In addition, the waist 5 at the peripheral portion of the absorber 4
When the diaper is worn, the
Waste cloth for fitting the strike part 5 and the leg part 6
G elastic member 7a and leg elastic member 7b,
Each is fixed by the top sheet 2 and the back sheet 3
It is provided. [0010] The left and right sides of the diaper in the longitudinal direction are provided with
The three-dimensional guard 8 is formed by disposing the nonwoven fabric, respectively.
The free end 9 of the three-dimensional guard 8 is elastically expanded and contracted by the three-dimensional guard.
A member 7c is arranged to form a gather. This
The configuration is the same as that of a conventional deployable disposable diaper.
You. Next, the disposable diaper 1 is constructed.
The material for forming each member will be described. Top sheet 2
As a liquid permeable sheet that allows excrement to pass through the absorber
It is preferable to have a feeling similar to underwear with
As the liquid permeable sheet, for example, woven fabric, nonwoven fabric, porous
Preferably, a functional film is used. Also surface sheet
2 around the periphery of silicone oil, paraffin wax, etc.
A method for applying an aqueous compound, or an alkyl phosphate
Apply a hydrophilic compound such as ter on the whole, and warm the periphery with warm water
Water-repellent treatment by the method of washing with
Leakage due to bleeding of urine or the like can be prevented. The back sheet 3 is made of thermoplastic resin.
Liquid impervious and steam drawn by adding filler to water-soluble resin
Permeable film sheet, or fiber assembly and polyole
A fin film laminate is used. [0013] In addition, the absorbent 4 may be defibrated pulp.
It is preferable to use a water-absorbing polymer mainly composed of
New The high-molecular water-absorbing polymer is an upper layer of the absorber 4,
It may be present in either the middle layer or the lower layer.
May be mixed. In addition, the polymer water absorption port
Rimmer can absorb and retain more than 20 times its own weight of liquid
Particles with retention properties and gelling properties
Is preferred, as such a high-molecular water-absorbing polymer,
For example, starch-acrylic acid (salt) graft copolymerization
Body, saponified starch-acrylonitrile copolymer,
Crosslinked product of sodium carboxymethylcellulose,
Preferred examples include a lylic acid (salt) polymer. Further, the waist elastic member 7a,
The leg elastic member 7b and the waist elastic
The elastic members 7c include thread rubber, flat rubber, and rubber, respectively.
Film-type rubber or film-like foamed polyurethane
And the stress at 50% elongation is 40%.
~ 150 grams are preferred. Further, the above-mentioned non-uniform guards forming the three-dimensional guard 8 are formed.
As for the woven cloth, those usually used for diapers are particularly restricted.
It can be used without. The disposable diaper 1 of the present embodiment is shown in FIG.
As shown in FIG. 1 and FIG.
Flaps 10a and 10b are connected to 1 and B2, respectively.
Of the left and right flaps 10a and 10b.
A flap fastening portion is provided at the tip 11 of the wrap 10a.
14 is provided, and the flap fastening portion 14
Place the left and right flaps 10a, 10b on the abdomen of the wearer.
So that it can be fastened
A has diaper fastening parts 20, 20,.
Are provided, and the diaper fastening portions 20, 20,.
Fastening the diaper in contact with the flaps 10a and 10b
It can be done. More specifically, as shown in FIG. 1 and FIG.
In addition, the flaps 10a and 10b are formed symmetrically.
From the proximal end 12 to the distal end 11, respectively.
The width has been reduced. Also the flap above
The fastening portion 14 is provided at the tip 11 of the flap 10a.
The flap 10b
The flap tip 11 is brought into contact with the back sheet side of
As a result, the flaps 10a and 10b can be fixed.
Has been made. In addition, the diaper fastening portions 20, 20,.
.. are provided on the upper and lower sides of the left and right sides of the ventral part A, respectively.
And two on each side for a total of four. Then, regarding the most characteristic part of the present invention
To explain, the flaps 10a and 10b are at their base ends.
It has a telescopic part 13 on the part 12 side. More specifically,
The expansion and contraction portion 13 is provided between the flaps 10a and 10b.
Body 15 and the left and right side edges B1, B2 of the back side portion B
Are connected to each other. And on
The flaps 10a and 10b are provided under the unstressed condition.
1.2 to 2 times the length of the tips 10a and 10b
Can be extended toIs preferred. That is, the elastic part 13
The entire flap is the length of the entire flap
Stretch performance that is 1.2 to 2 times longer
HaveIs preferred. Here, "unstressed" refers to an external force
Means nothing. In addition, the extension is possible.
If the effective length is less than 1.2 times,
Unable to follow, the effect of improving the fit is reduced
However, if it exceeds twice, the operability at the time of wearing will deteriorate
Is not preferred. Further, the flaps 10a, 10b
The degree of expansion (extendable length range) of the abdomen A
Abdominal side formed with the waist elastic member 7a formed thereon
It is larger than the degree of elasticity of waist gathers in part Aof
Is preferred. Here, the elasticity of the waist gather is
It is preferably 1.1 to 1.4 times. The length L1 of the flap body 15 is
The ratio of the length of the elastic portion 13 to the length L2 is L1: L2 = 90.
~ 50: 10 to 50 is preferred. The elastic part 1
When the length L2 of 3 is less than 10, sufficient elasticity is exhibited.
If it does not exceed 50, the above-mentioned
The flap fastening portion 1
It is preferable that the content be within the above range, since the binding property of No. 4 is impaired.
New Next, the flap fastening portion 14 and the
Formation of the diaper fastening portion 20 and the flaps 10a and 10b
The material will be described. The flap fastening portion 14 and the diaper stopper
The attachment portions 20 are each formed by a convex member of a mechanical fastener.
Is formed. As the convex member of the mechanical sheet,
Many anchor-type male engaging members are arranged on the base sheet.
A number of fishing-type male engaging members are arranged on the base sheet.
"Magic Tape"
(Registered trademark, manufactured by Kuraray Co., Ltd.), "Quicklon" (registered trademark)
, Manufactured by YKK), "Majikurosu" (registered trademark, Kanebo)
A commercially available product such as Ubel Touch Co., Ltd.) can also be used. In the flaps 10a and 10b,
The flap body 15 includes a nonwoven fabric and a film sheet.
Formed by a laminate of at least two or more layers
It is preferred that it is formed. Further, the laminate is not
The woven fabric and the film sheet are partially bonded by
In general, it is formed by bonding in a point or line
preferable. Here, examples of the above-mentioned film sheet include:
For example, as described in JP-A-2-47031 and JP-A-2-47031,
No. 75151, JP-A-5-331306, etc.
It is possible to use the described film sheet etc.
Specifically, crystalline high-density polyethylene resin, crystal
Crystalline polyolefin resin such as crystalline polypropylene resin,
Among them, homo crystalline polypropylene resin, especially melt
Homocrystalline polypropylene tree with an index of 5 or less
A film sheet made of fat is used. In addition,
In the porous resin membrane, a filler used for conventional pore opening,
Additives such as plasticizers are not included.
Small amount used to stabilize crystalline polyolefin resin
For stabilizers (antioxidants etc.) and for coloring or hiding
It contains only small amounts of colorants, concealing materials, etc. used. The above nonwoven fabric is usually disposable.
Unlimited use as long as it is used for diapers
Can be, for example, polyethylene, polypropylene
Thermoplastic, polyethylene terephthalate, polyamide, etc.
Filaments formed from a single resin of a conductive resin; core /
Composite filament with shell, side-by-side structure, etc.
The filament is required by ordinary melt spinning using
Stretched, crimped, and cut short fibers as necessary
The fibers are spot-bonded with heat, adhesive, etc.
Nonwoven fabric entangled, ie, wet method, dry method, span
Insulation formed by lace method, spunbond method, etc.
A woven fabric or the like is used. Also, forming multi-layer filament
Then, the multilayer filament is divided by an external force.
A nonwoven fabric made of split filaments can also be used.
In addition, non-woven fabrics directly formed by melt blown molding
Cloth can also be used. Above all, high-elastic resin as core
Core having low elasticity and / or low melting point resin for shell
/ Non-woven fabric using shell-type composite filament
Good fit and elasticity, laminated with the above microporous resin film
Productivity and safety because only heat fusion is required
And cost. At this time, the composite
As for the filament, the core / shell is made of polyethylene
Phthalate (PET) / polyethylene (PE), poly
Propylene (PP) / Polyethylene (PE), Polypropylene
Pyrene (PP) / polypropylene (PP), poly
Olefin-based filaments are exemplified. The filler used in the nonwoven fabric
The softness and texture of the resulting nonwoven fabrics
The smaller the thickness is, the more preferable it is.
The lower limit is not particularly limited, but is 0.1 denier.
Up to le. If it is less than this, it is difficult to manufacture.
The basis weight of the nonwoven fabric 112 is 5 to 200 g / m ^Two
Is preferred, and 10 to 50 g / m^TwoIs particularly preferred.
Also, the apparent thickness (measurement sample is 10cm × 10cm
cm plate and 0.5 gf
/ Cm^TwoIt is the thickness when hung. In addition, the measurement
The test was carried out using a product name “PA-1830” manufactured by U.S.A. )
It is preferably from 15 to 700 μm, particularly preferably from 30 to 4 μm.
00 μm. The bonding pattern for the above-mentioned linear bonding
Preferred examples include fastening strength when fastening, fastening
Considering the operability and flexibility of
Shape, triangular shape, circular shape, etc.
Preferably the pattern is formed in a hybrid shape
Sheet tensile strength and tear strength,
From the fastening and texture of the part,
It is preferable that the shape is changed. Further, the adhesive pattern for the above-mentioned point-like bonding is used.
The diaper is parallel to the width of the diaper to improve the texture
Or scattered diagonally rather than vertically
It is necessary to form a point-like bonding part and bond it.
It is preferable from the viewpoint of tear strength and texture. In addition, the above point-like
The shape of the bonded part is not particularly limited, but from the texture,
Shapes, rhombuses, tortoiseshell shapes, etc. are preferred. In addition, when the above-mentioned linear bonding is performed,
The line width of the attachment portion is preferably 0.2 to 3 mm, more preferably
Is 0.5 to 1.5 mm,
The ratio of the area to the area of the unbonded part (glued
Area (the area of the part that is not bonded)
Preferably 5:95 to 70:30, more preferably 20:70.
80 to 40:60. When the line width is less than 0.2mm
If there is, the adhesion of the diaper is reduced due to insufficient adhesive strength, and 3
If it exceeds mm, the flexibility is undesirably reduced.
If the area ratio of the adhesive portion is less than 5, the back surface
When the shape retention of the laminate with the sheet 3 is insufficient and exceeds 70,
It is preferable to set it within the above range because the texture will be worse.
No. Further, the area of the above-mentioned point-like bonding portion is preferably
0.05-5mm^Two, More preferably 0.5 to 2 mm^Two
And the area of the part that is glued and not glued
Ratio to the area of the part (the area of the bonded part: the adhesive
The area of the portion not covered) is preferably 1:99 to 4
0:60, more preferably 5:95 to 20:80.
You. The above area is 0.05mm^TwoAdhere if less than
Difficult, 5mm^TwoIf it exceeds, the feeling will not be bad
This is not preferred. In addition, the area of the bonding portion is not more than 1.
If it is full, the adhesive strength will be insufficient and the diaper's fixability will decrease
However, if it exceeds 40, it is not preferable because the feeling becomes poor.
No. [0029] The laminate may be made of an adhesive or hot melt.
Adhesive and formed by a normal adhesive method such as adhesive
Productivity, safety and cost, and security
From the viewpoint of preventing the lowering of the flexibility of the sheet and improving the texture
Formed by laminating and bonding by heat fusion
Is preferred. When performing heat fusion,
The diaper fastening portion 20 and the flap fastening portion 14 are engaged.
It is preferable to heat from the nonwoven fabric 20 side so that
No. Further, in the present invention, the adhesives are adhered in a dot shape.
Thereafter, the adhesive may be further adhered linearly. Adhesive like this
After that, in the case of further linear bonding,
Ratio of the area of the part to the area of the unbonded part (adhesion
Area of the part that has been glued: the area of the part that is not glued)
Preferably from 10:90 to 80:20, more preferably 2
0:80 to 50:50. Here, the above-mentioned laminated body has a surface which is in contact with the skin.
Texture and the flap fastening part 14 and the diaper fastening part
20 in consideration of being able to engage with
The three-layer structure, in which the above nonwoven fabric is arranged on both sides of the
A laminate is particularly preferably used. Further, the elastic portion 13 is provided with the flap 1.
Expansion and contraction by pulling 0a and 10b in the longitudinal direction
Sex is developed. Here, the "Length"
Stretching by hand pull
"Has been" does not have elasticity before use
In use, the flap is stretched in its longitudinal direction.
By extending its length, elasticity is developed
Means being done like that. Therefore, the above expansion and contraction
As a material for forming the portion 13, specifically, the following multi-row sheet
And the like. Multi-row sheet; moisture-permeable area as plastically deformable area
(A) and stretchable regions (b) are alternately arranged in multiple rows.
To The moisture-permeable region in the multi-row sheet
(A) and the stretchable region (b) are each stretched.
It is a region where moisture permeability and elasticity are exhibited. Also,
"Alternately in multiple rows" means that the moisture permeable region (a) and the
Means that the elastic regions (b) are alternately arranged
And as a “multi-row sheet that is arranged alternately in multi-row”
Specifically, from the material for forming the moisture-permeable region (a),
The material for forming the above-mentioned stretchable region (b) is placed on a sheet
And multi-row sheets arranged in a spiral shape
No. The moisture-permeable region (a) in the multi-row sheet
Ratio between the area of the elastic region and the area of the elastic region (b) (a: b)
Is preferably 2: 8 to 8: 2, and the moisture-permeable region
The weight ratio (a: b) between (a) and the stretchable region (b) is
The ratio is preferably from 2: 8 to 8: 2. Also provided in a linear shape
When the line width of the elastic region is 1 to 10 mm
Is preferred. Hereinafter, the moisture permeable region (a) and the expansion / contraction
The material for forming the conductive region (b) will be described. As a material for forming the moisture-permeable region (a),
Is not particularly limited as long as it is a material forming a moisture-permeable sheet.
Composition comprising, for example, a thermoplastic resin and an inorganic filler
Etc. can be used.
It is preferably used. Composition: 100 parts by weight of polyolefin resin, filler 5
From 0 to 400 parts by weight and 0.1 to 20 parts by weight of a softening agent
Composition. Composition: 65 to 90 parts by weight of a crystalline polyolefin;
At a temperature above the melting point of the crystalline polyolefin,
Is miscible and soluble in water-soluble polyolefins.
At temperatures below the melting point of the crystalline polyolefin,
Compound that causes phase separation for polyolefin 35 to 10
A composition obtained by melt-kneading the above components. Composition: 100 parts by weight of a polyolefin resin and the polyolefin resin
Thermoplastic resin incompatible with olefin resin 10-1
Composition obtained by melt-kneading with 100 parts by weight
object. Hereinafter, the above-mentioned compositions (1) to (4) will be described in detail.
I will tell. First, the composition will be described. the above
As the polyolefin resin used in the composition
Are olefin homopolymers or copolymers or olefins.
Can be used with copolymers of
Wear. Ethylene or propylene is preferred as the olefin.
Used appropriately. As the above polyolefin resin,
Physically, especially high-density polyethylene, low-density polyethylene
And linear low density polyethylene are preferably used.
Even if the density is 0.910 to 0.940 g / cm^ThreeIn Mel
With a flow rate (MFR) of 0.1 to 5 g / 10 min
Low-density polyethylene is preferably used. Also on
As the polyolefin resin, the above homopolymer and
It is also preferable to use two or more copolymers
No. In particular, crystalline polyolefin and X-ray crystallization
The degree is 5 to 25% and the density is 0.86 to 0.90 g / cm.^Three
(Ethylene-α-olefin) copolymer
The compound gives flexibility to the obtained porous sheet,
Excellent in tensile and tear strength
Can be In addition, the above (ethylene-α-olefin)
The amount of the rimer is generally 100
The ratio is 20 to 100 parts by weight based on parts by weight. still,
The above polyolefin resin includes the above polyolefin resin
Other than the above-mentioned polyolefins as long as the properties of
May be blended. The above filler used in the above composition is
Filling usually mixed in rubber or plastic
Any agent can be used without particular limitation.
For example, calcium carbonate, gypsum, calcium sulfate, calcium phosphate
Lucium, magnesium carbonate, magnesium sulfate, hydrated
Silicic acid, silicic anhydride, soda ash, sodium chloride, sulfuric acid
Sodium, barium sulfate, talc, clay, various seme
Cement, volcanic ash, shirasu, titanium oxide, iron oxide and carb
Inorganic fillers, such as carbon black; various metal powders;
Inorganic substances and inorganic metal-based organic metal salts and the like.
It is. In addition, phenolic resin, epoxy resin and polyamide
Thermosetting resin such as sodium acrylate; polyethylene, poly
Thermoplastic trees such as propylene and polyacrylate
Radiation-crosslinked resin; or porous melting point
Use a polymer such as resin that is higher than the sheet forming temperature
Can also be. The above filler preferably has an average particle size.
50 μm or less, more preferably 0.05 to 30 μm
Powder, most preferably in the range of 0.1 to 5 μm
It is desirable to use it as granules. The above-mentioned polyolefin resin and the above-mentioned filler
The mixing ratio is based on 100 parts by weight of the polyolefin resin.
50 to 400 parts by weight of filler, preferably 60 to 300 parts by weight
It is desirably in parts by weight. As a softening agent used in the above composition
Are plasticizers and lubricants usually compounded in rubber and plastics
Can be used, for example, fatty acids and aliphatic alcohols
Monoester, aromatic carboxylic acid and fat
Monoester or polyester consisting of aliphatic alcohol
Consisting of aliphatic polycarboxylic acid and polyalcohol
Polyester, monocarboxylic acid and / or polycarboxylic acid
Acid and monoalcohol and / or polyalcohol
Polyester, alcohol and / or carboxylic acid
Ester or polyester, aliphatic amide,
Aromatic amide, fatty acid metal soap, aromatic carboxylic acid
Metal soap, butadiene oligomer, butene oligomer,
Isobutylene oligomer, isoprene oligomer, petroleum
Resin, coumarone resin, ketone resin, chlorinated paraffin,
Silicone oil, liquid paraffin, polyethylene wax
Is mentioned. The above polyolefin resin and the above softening agent
The mixing ratio of the above softener and the above polyolefin resin
And the affinity between the softening agent and the filler and
Optional depending on the flexibility required for the porous sheet
Is 100 parts by weight of the polyolefin resin,
The softening agent is preferably 0 to 20 parts by weight, more preferably
Is 0.1 to 10 parts by weight. Next, the above composition will be described. Up
The crystalline polyolefin used in the composition,
Mainly made of polypropylene resin, but other
Copolymer resin of ethylene and ethylene, propylene and ethylene
And / or other vinyl contained to the extent that crystallinity is not impaired
It may be a copolymer resin with a monomer. Also, polypropylene
Resin or ethylene / propylene copolymer resin and polyether
It may be a blend of a ethylene resin. In addition, the above crystalline po
Reolefin resins are preferred for their melt index
5 g / 10 min or less, more preferably 0.2-4 g / min.
10 minutes. Among them, mel which is generally used for extrusion molding
Crystalline polyp with a toe index of 0.2 to 3 g / 10 min
Propylene resin, crystalline ethylene-propylene copolymer tree
Fats and blends of these resins with polyethylene resins
A metal system is particularly preferably used. Especially texture and strength (fall
Used as a backing material for absorbent articles from the viewpoint of
In the case of ethylene-propylene block copolymer tree
Fat, said resin and / or polypropylene resin and polyethylene
A blend system with a ren resin is preferred. Such a bren
Monomer equivalent of ethylene and propylene
Weight ratio (ethylene weight / propylene weight) is 4 / 96-
A 40/60 crystalline resin composition is most preferred. Also on
Polymer (resin) or copolymer (copolymer tree)
Fat) can be used in combination of two or more. The above melt
The index is based on ASTM D-1238,
Polypropylene resin and polypropylene copolymer resin
230 ° C, 2.16 kgf, polyethylene resin is 19
It is a value measured at 0 ° C. and 2.16 kgf. The compound used in the composition is
At temperatures above the melting point of the crystalline polyolefin,
Compatible with crystalline polyolefin and
At temperatures below the melting point of the crystalline polyolefin,
It causes phase separation with polyolefin. like this
Examples of such compounds include mineral oil and esters in the molecule.
Compounds having a bond can be given. The mineral oil is collected from nature and has low volatility.
Aromatic / alicyclic / aliphatic carbon water from which components have been removed
And fats from which aromatics have been removed by hydrogenation or the like
Cyclic / aliphatic hydrocarbons are used. Even better
Ethylene / α-olefin oligo called synthetic mineral oil
Mers are used. Further, there is an ester bond in the above molecule.
The compound can be an aliphatic or aromatic monobase.
Or polybasic carboxylic acid and aliphatic, alicyclic or aromatic
Each combination of a monohydric or polyhydric alcohol,
Has both hydroxyl and carboxyl groups in the molecule.
Obtained from the dehydration condensation reaction by the combination of
Ester compound (ie mono or polyester)
No. As the above aliphatic and aromatic carboxylic acids
Is preferably a polybasic carboxylic acid, particularly an aromatic polybasic carboxylic acid.
In rubonic acid, aromatic dicarboxylic acid, tricarboxylic acid and
Tetracarboxylic acids are preferred, for example phthalic acid, trime
Lit acid, pyromellitic acid and the like can be mentioned. Aliphatic mosquito
Examples of rubonic acids include aliphatic dicarboxylic acids and tricarboxy.
Acid is preferred, for example, adipic acid, sebacic acid or
And citric acid. As the above alcohol
Is preferably a monovalent alkyl alcohol or the like, for example,
Octyl alcohol, lauryl alcohol, stearyl
Alcohol, oleyl alcohol and the like can be mentioned. Compounds having an ester bond in the above molecule
In particular, aromatic polybasic carboxylic acids and monovalent
Ester compounds obtained from alkyl alcohol
Mono or polyester), aliphatic polybasic carboxylic
Esterification from acids and monohydric alkyl alcohols
Compounds (ie, mono or polyester) are preferred. Ma
Polyhydric alcohol (especially polyhydric alkyl alcohol)
And monocarboxylic acids (especially aliphatic monocarboxylic acids)
Stele compounds (ie, mono or polyester) are also preferred.
Specifically, for example, glycerin, diglycerin,
Trimethylolpropane, pentaerythritol, dipe
Polyhydric alcohols such as antaerythritol or sorbitan
And capric acid, lauric acid, palmitic acid, steari
Acids or aliphatic monocarboxylic acids such as oleic acid
And the like ester compounds. Also,
A small amount of such an amount that the obtained ester compound does not gel
Polycarbonic acid such as dipic acid can be added to the ester.
Wear. Furthermore, from the viewpoint of environmental pollution prevention and safety, aliphatic
Polyester obtained from carboxylic acids and aliphatic alcohols
Are preferred. Compounds having an ester bond in the above molecule
The product comprises one or more of the above carboxylic acids and the above alcohol
Can be adjusted from one or more of the
The method is not particularly limited, and any conventionally known esterification
Methods can also be used. In addition, S
The compound having a ter bond is the carboxyl in the carboxylic acid.
Groups and all of the hydroxyl groups in the alcohol
It does not have to be a reacted ester compound,
Carboxyl group and / or hydroxy in alcohol
Is a partial ester left partially unreacted.
You may. The above compounds have a volatilization temperature at normal pressure.
Preferably at least 200 ° C, more preferably at least 240 ° C
Above, most preferably above 260 ° C., and the melting point is
Preferably at 100 ° C or less, more preferably at 80 ° C or less
is there. As used herein, the term “volatile temperature” refers to a thermobalance.
Used, in a nitrogen stream (30 ml / min), at a heating rate of 10
° C / min, measured with 10mg sample, heat loss curve
Draw, means the temperature of 1% weight loss. Preferred specific examples of the above compounds include minerals
Machine lubricating oil sold by oil companies,
Process oil for rubber, liquid paraffin for fiber, etc.
As a compound having an ester bond in the molecule,
Distearyl phthalate, trioctyl trimellitate
G, tetraoctyl pyromellitate, distearyl azide
Pate, distearyl sebate, trimethylol pro
Pantrilaurate, pentaerythritol tetracap
Rate and the like can be mentioned. They are also crystalline
Polyolefin solubility parameters and sets within a few units
You can choose from combinations. The above crystalline polyolefin and the above compound
The compounding ratio of the crystalline polyolefin is 65 to 90 weight
35 to 10 parts by weight of the above compound relative to parts by weight
preferable. In the composition, an optional component
Nucleating agent, inorganic filler for tear prevention, inorganic filler and / or
Alternatively, a coloring agent may be added. As the crystal nucleating agent,
Crystalline polyolefin, especially the above-mentioned crystalline polypropylene
Controls the size of the crystal of, for example, p-te
rt-butyl aluminum benzoate, 1,2,3,4
Dibenzylidene sorbitol and 1,2,3,4-di
-Use (p-ethylbenzylidene) sorbitol or the like
Can be The nucleating agent is the total amount of the composition.
Is preferably added at 0.5 wt% or less. Up
As the inorganic filler for preventing tearing, anhydrous silica or zeo
Light or the like can be used, based on the total amount of the composition.
It is preferable to add 1 wt% or less. The above inorganic filler
Is used to provide concealment to the moisture-permeable sheet.
Yes, for example, titanium oxide, barium sulfate, calcium carbonate
And talc can be used. Inorganic filler
Is added in an amount of 20% by weight or less based on the total amount of the composition.
Preferably. Examples of the coloring agent include phthalo
Cyanine blue, quinacridone red, dioxane bai
Oret and isoindolinone can be used.
And 0.05% by weight or less based on the total amount of the above composition.
Is preferably added. Further, the above composition will be described. Up
As the above polyolefin resin used in the composition
Is not particularly limited, and is used, for example, in the above composition
It is possible to use the same as the above polyolefin resin
it can. In addition, the polyole used in the composition
As the thermoplastic resin incompatible with the fin resin
Is, for example, general-purpose polystyrene, high-impact polystyrene,
Acrylonitrile-styrene copolymer, butadiene
Tylene copolymer and acrylonitrile-butadiene
Styrene-based polymers such as Tylene copolymer; Polymethylene
Methacrylate; polyethylene terephthalate and polyethylene terephthalate
Polyester such as butylene terephthalate; Nylon
6 and polyamides such as nylon 66; polycarbonate
G; polyacrylonitrile; and modified products thereof and
Select and use at least one or more of the derivatives
Can be. In addition, the thermoplastic resin includes a thermoplastic resin.
Lastmers, such as styrenic polymers, polyolefins
, Polyurethanes, polyesters, polyamides
, Poly (1,2-butadiene), poly (trans-
One or more selected from 1,4-isoprene)
By adding the above polymer, the thermoplastic resin
Dispersibility can be easily controlled. In addition, the above thermoplastic
When the resin is a composition with the above polyolefin resin,
The average particle size is preferably 50 μm or less, more preferably
Is in the range of 0.05 to 30 μm, particularly preferably 0.1 to
It is desirable to disperse in the range of 5 μm. Further, a sheet is stretched to the above composition.
In order to control the size and number of holes when
Len-acrylic acid copolymer, ethylene-acrylic acid ester
Ter copolymer, ethylene-methacrylic acid copolymer, ethylene
Len-methacrylic acid ester copolymer, ethylene-
Lylic acid-acrylate copolymer, ethylene-meta
Crylic acid-acrylic acid ester copolymer, ethylene-vinegar
Vinyl acrylate-glycidyl methacrylate copolymer and ethylene
From maleic anhydride-maleic anhydride-acrylate copolymer
Add one or more selected ethylene copolymers
You can also. When the melting temperature of the thermoplastic resin is
If the temperature is close to the refining resin sheet molding temperature,
The melt viscosity of the olefin and the melt viscosity of the thermoplastic resin
By controlling, it is possible to
Reduce the shearing force of the thermoplastic resin on the olefin resin
Is important. In this case, the composition softens
By adding an agent, the polyolefin and the heat
Make the melt viscosity and stretch opening property of plastic resin the target
be able to. As the softening agent, the composition
It is possible to use the same softening agent as used above.
Wear. The above polyolefin in the above composition
The mixing ratio of the resin and the thermoplastic resin is
10 to 10 parts by weight of the thermoplastic resin
0 parts by weight, preferably 20 to 100 parts by weight. The above compositions and compositions are generally modified
Using a high-speed stirring (mixing) machine such as a shell mixer,
Can be prepared by mixing, preferably after mixing
The mixture is melted and kneaded by a twin-screw extruder, etc.
Extruded, cut and pelletized,
It can be obtained as a composition. In such a preparation
Has a small amount of stabilizer, colorant and / or lubricant at the same time
Alternatively, they can be mixed separately. The above composition is generally prepared by using a twin screw extruder.
Melt and knead each component to form pellets.
Can be. During preparation, melt in a twin-screw extruder
The above compound is added to a certain polyolefin by a gear pump or the like.
For melt kneading by injecting into a twin screw extruder
be able to. The above-mentioned expansion and contraction constituting the porous sheet of the present invention
The elastic region (b) is used for imparting elasticity or the like to the porous sheet.
The stretchability of the stretchable area (b) is 50
The residual strain when the tension is released after% elongation is 20% or less
Is preferred. In the present invention, the stretchable region (b) is
As a forming material to be formed, a thermoplastic elastomer is preferable.
More preferably, the thermoplastic elastomer is a styrene-based thermoplastic elastomer.
Elastomer, olefin elastomer, polybutadi
Ene-based elastomers, polyester-based elastomers,
Liamide elastomer, urethane elastomer, salt
Bi-based elastomer, fluorine-based elastomer, other eye
Onomer resins, silicone resins and mixtures thereof
And, among others, styrenic elastomers or olefins
Thin elastomers are preferred. Further, the stretchable region (b) is formed with the moisture permeable
When stretched simultaneously with the region (a), the stretchable region (b)
To prevent (fix) the body from temporarily contracting.
The thermoplastic elastomer is used as a material for forming the shrinkable region (b).
And polyolefin resin as a thermoplastic resin
To form a composition. At this time,
Among the plastic elastomers, the above-mentioned polyole
Styrene-based elastomer due to its affinity with fin-based resin
Alternatively, an olefin elastomer is preferably used.
Further, as the polyolefin-based resin,
The above poly which is used as a material for forming the moisture-permeable region (a)
The same olefin resin can be used. The
Tylene elastomer or olefin elastomer
The mixing ratio (weight ratio) of
Or 80/20 to 20/80, more preferably 70 /
30 to 30/70. As the styrene-based elastomer, silicone
"Clayton" and "Kaliflex"
Asahi Kasei Kogyo Co., Ltd.
And the like, and the above-mentioned olefin-based elastomer and
The product name "Milastomer" manufactured by Mitsui Petrochemical Industries,
Sumitomo Chemical Co., Ltd. product name "Sumitomo TPE"
You. Representative groups for each of these thermoplastic elastomers
Reed was established on May 31, 1982 by CMC Co., Ltd.
Technical Report issued by
port) No21 Listed in “Thermoplastic elastomer”
You. Also, plastics issued by the Industrial Research Council
Vol. 44, no. On page 11, 39, "Thermoplastic
Focusing on new grades in the section `` Physical properties and moldability of stoma,
"The present state of thermoplastic elastomer molding technology"
Thermoplastics marketed in Europe and the United States in the section "States and challenges"
Elastomers are described. The material for forming the stretchable region (b)
Then, use a composition using a styrene-based elastomer
In this case, the most preferred composition is the following component (a):
0.3 to 0.7 parts by weight, the following (b) component 0.2 to 0.6
Parts by weight and 0.05 to 0.3 parts by weight of the following component (c)
Composition. (A) component: The content of the aromatic vinyl compound is 10 to 40.
Wt% aromatic vinyl compound-conjugated diene block copolymer
Styrene based hydrogenated conjugated diene moiety
Elastomer. (B) Component: polyolefin resin. Component (c): melting point or softening point is 80 ° C. or higher, average molecular weight
Resin with an amount of 400-2000. The component (A) is an aromatic hydrocarbon polymer
A TPE comprising at least one aromatic vinyl compound
Polymer block and at least one conjugated diene
It contains a hydrogenated product of a polymer block. Also,
Its structure is (AB) n type, (AB) nA type, (A
-B) Any of n-C type (where A is an aromatic vinyl)
Polymer block (hereinafter referred to as “polymer block”).
A "), B is hydrogen of the polymer block of the conjugated diene
Additives (hereinafter referred to as “polymer block B”) and C are
A coupling agent residue, n represents an integer of 1 or more],
May be linear or random. Hydrogenation of diene moiety
Although there is no limitation on the method for obtaining the derivative,
In order to impart thermal stretchability to the shrinkable region (b),
Hydrogen in which 80% or more of the conjugated diene block is hydrogenated
Preferably, it is an additive derivative. Monomers Constituting the Polymer Block A
Is a styrene-based monovinyl-substituted aromatic hydrocarbon.
And preferably styrene, but α-methylstyrene, etc.
Is also used. Further, constituting the above polymer block B
The monomer is a conjugated diene, specifically, butadiene.
, Isoprene or a mixture of both is preferably used.
You. Then, the hydrogenation in the polymer block B is performed.
80% or more [hydrogenated polymer unit
Number of units / number of units in the entire polymer block) × 100
(%) ≧ 80%]. In addition, polymer
Lock A and polymer block B (C for a composition containing C
B)) is 10 / 90-40 / 60.
is there. Further, the polymer block A and the polymer block B are
The combined molecular weight is preferably the number average molecular weight determined by HPC.
20,000 or more, more preferably 30,000
２５０250,000, most preferably 40000-2
00000. As the component (a), a shell
"Shell Elastomers Carif" 1992 Edition
lex TR / Kraton G "
"Clayton G" series, which is a polymer-based TPE,
No. The olefin resin as the component (b)
Α-olefins such as ethylene, propylene and butylene
Olefin-based heats consisting of fin homo- or copolymer
A plastic resin is used, a resin usually used for thermoplastic molding
Is used. Among them, polyethylene, polypropylene
Injection molded products or extruded products are preferred, such as diapers
For applications that require flexibility,
Low density polyethylene is suitable and linear low density polyethylene
Len (L-LD-PE) is most suitable. The resin as the component (c) has a melting point or
The softening point is preferably 80 ° C. or higher, more preferably 100 ° C.
C. or higher, the average molecular weight is preferably 400 to 2000,
More preferably, it is a resin of 600 to 1500,
Used are hydrogenated terpene resins, alicyclic-added hydrogen resins, etc.
It is. A typical example of such a resin is Yasuhara Yushi
Co., Ltd., trade name "Clearon", Arakawa Chemical Industry Co., Ltd.
Manufactured and trade name "Alcon". In order to produce the multi-row sheet, the moisture permeable
The transparent material obtained by extruding the forming material of the conductive region (a)
A material for forming the above-mentioned stretchable region (b) is placed on a wet sheet by line drawing.
Shape, spiral shape, etc., and partially laminated
It can be easily obtained by the method. The flap fastening section and the diaper fastening section
Is the above forming material (convex member of the mechanical fastener)
Adhering to the flap or the surface sheet side of the ventral side, respectively
It can be easily formed by
The flaps 10a and 10b are provided with an ultrasonic seal (thermal fusion),
It can be formed by fixing with an adhesive or the like. When using the disposable diaper 1 of the present embodiment
First, as shown in FIG. 3A, the back side of the wearer 30
After the back side portion is brought into contact with the waist portion of the flap, the flap 10
a, 10b are pulled up in the direction of the arrow to
Is engaged with the back sheet side of the flap 10b and fastened,
Then, the abdominal part is pulled up to the abdominal side of the wearer 30, and FIG.
As shown in (b), the diaper fastening portion 20 is
Engage with the back sheet side of the wraps 10a and 10b to secure
By doing so, it can be used. The disposable diaper according to the present embodiment has the
Because it has a configuration, it is excellent in operability at the time of mounting,
Also, it has excellent fit. In particular, the elastic part 13 is provided.
The flap 10 follows the movement of the wearer
Therefore, the fitting property is particularly good. In addition, the above stop
The bonding force of the attachment portion 14 to the flap 10 is
It is improved by the elasticity of the contraction portion 13. The disposable diaper of the present invention has the above-described shape.
The state is not limited at allI. Also,UpNote cloth
The gather may not be provided. In other words,
The effect follows the wearer's movement well, so
It is not necessary to provide waist gathers. [0071] The disposable diaper according to the present invention can be operated at the time of wearing.
Excellent workability and excellent fit during wearing
It is. Therefore, disposable items that can be left standing
It is suitable as a diaper.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a developed view showing a back sheet side of a disposable diaper as a first embodiment of the present invention. FIG. 2 is a sectional view schematically showing a section taken along line II-II of FIG. FIG. 3 is a view showing a use form of the disposable diaper of the form shown in FIG. 1, and FIG. 3 (a) is a front view showing a state in which a flap fastening portion is fastened; FIG. 3 (b)
FIG. 4 is a front view showing a state where the diaper fastening section is fastened. [Description of Signs] 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Waist section 6 Leg section 7a Waist section elastic elastic member 7b Leg elastic elastic member 7c Solid guard elastic elastic member 8 Solid guard 9 Free end 10 Flap 11 Distal end portion 12 base end portion 13 elastic portion 14 flap fastening portion 15 flap body 20 diaper fastening portion A belly side B back side

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61F 13/15-13/84 A61F 5/44

Claims (1)

(57) [Claims 1] A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these two sheets. In the deployment type disposable diaper, in which the abdominal part located on the back side and the dorsal part located on the dorsal side are formed, flaps are respectively connected to left and right side edges of the dorsal part, At least one end of the flap is provided with a flap fastening portion, and the flap fastening portion enables the left and right flaps to be fastened to the wearer's abdomen. The diaper fastening portion is provided on the left and right sides of the abdominal portion, and the diaper fastening portion is brought into contact with the flap so that the diaper can be fastened. Has a telescopic part on the base end side Cage, the telescopic unit, disposable diaper, characterized in that stretch by pulling the flaps in the longitudinal direction have been made to express.